ASN Wikibase Occurrence # 207619
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| Date: | Friday 21 July 2017 |
| Time: | 08:30 |
| Type: |  Robinson R22 |
| Owner/operator: | Rocky Mountain Rotors LLC |
| Registration: | N28VH |
| MSN: | 3687 |
| Year of manufacture: | 2004 |
| Total airframe hrs: | 2640 hours |
| Engine model: | Lycoming O-360 SERIES |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Bozeman Yellowstone International Airport, Gallatin County, Montana -
 United States of America
|
| Phase: | Approach |
| Nature: | Training |
| Departure airport: | Bozeman Yellowstone International Airport, Gallatin County, Montana (K |
| Bozeman Yellowstone International Airport, Gallatin County, Montana (K | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Substantially damaged July 21 2017 when crashed at Bozeman Yellowstone International Airport (KBZN), Gallatin County, Montana, at approximate co ordinates Latitude: 45.777500, Longitude -111.151944. According to the helicopter flight instructor, he was demonstrating simulated 180° right turn auto rotations. He reported that, during the entry of the third auto-rotation, the helicopter attitude was excessively nose low and the descent rate was high. He initiated a power-on recovery; however, the flare was initiated too late. He applied forward cyclic to level the skids and increased collective to its mechanical limit, but the helicopter touched down hard, and one of the main rotor blades struck the tail boom.
The helicopter sustained substantial damage to the tail boom. The pilot reported in the National Transportation Safety Board’s Pilot Aircraft Accident Report, “The event could have been avoided by recovering the auto rotation sooner and doing a go-around.”
The operator reported that there were no pre-accident mechanical malfunctions or failures with the helicopter that would have precluded normal operation.
Probable Cause: The flight instructor’s unstabilized auto-rotation, which resulted in a hard landing.
Accident investigation:
 |
|
Sources:
NTSB
2. FAA Registry: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=N28VH
3. http://www.kathrynsreport.com/2017/07/robinson-r22-n28vh-rocky-mountain.html.
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Mar-2018 20:12 | ASN Update Bot | Added |
| 13-Aug-2018 15:51 | Dr.John Smith | Updated [Operator, Location, Phase, Departure airport, Destination airport, Source, Narrative] |
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